[PATCH 1/4] testcommon: DESTROY: wait for killed daemon

[Eric Wong <e@yhbt.net>]

Otherwise, the waitpid(-1, 0) call in Xapcmd::process_queue()
may reap it in a subsequent test when using t/run.perl to reuse
processes for testing.

While we're at it, make Xapcmd::process_queue warn about unknown
PIDs in case other PIDs leak through to us in the future.
---
 lib/PublicInbox/TestCommon.pm | 6 +++---
 lib/PublicInbox/Xapcmd.pm     | 6 +++++-
 2 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/lib/PublicInbox/TestCommon.pm b/lib/PublicInbox/TestCommon.pm
index 6e3e9d8c..e9efbac7 100644
--- a/lib/PublicInbox/TestCommon.pm
+++ b/lib/PublicInbox/TestCommon.pm
@@ -319,8 +319,9 @@ sub kill {
 }
 
 sub join {
-	my ($self) = @_;
+	my ($self, $sig) = @_;
 	my $pid = delete $self->{pid} or return;
+	CORE::kill($sig, $pid) if defined $sig;
 	my $ret = waitpid($pid, 0);
 	defined($ret) or die "waitpid($pid): $!";
 	$ret == $pid or die "waitpid($pid) != $ret";
@@ -333,8 +334,7 @@ sub DESTROY {
 		PublicInbox::TestCommon::wait_for_tail();
 		CORE::kill('TERM', $tail);
 	}
-	my $pid = delete $self->{pid} or return;
-	CORE::kill('TERM', $pid);
+	$self->join('TERM');
 }
 
 1;
diff --git a/lib/PublicInbox/Xapcmd.pm b/lib/PublicInbox/Xapcmd.pm
index 8e2b9063..337978bd 100644
--- a/lib/PublicInbox/Xapcmd.pm
+++ b/lib/PublicInbox/Xapcmd.pm
@@ -142,7 +142,11 @@ sub process_queue {
 		while (scalar keys %pids) {
 			my $pid = waitpid(-1, 0);
 			my $args = delete $pids{$pid};
-			die join(' ', @$args)." failed: $?\n" if $?;
+			if ($args) {
+				die join(' ', @$args)." failed: $?\n" if $?;
+			} else {
+				warn "unknown PID($pid) reaped: $?\n";
+			}
 		}
 	}
 }